The goal of this study was to evaluate the preventive analgesic effectiveness of paracetamol and celecoxib in laparoscopic cholecystectomy.Randomized prospective study was undertaken, 75 patients of class ASA I and II were included, divided into three groups: P (Paracetamol 1000 mg), C (Celecoxib 200 mg) given orally one hour before induction and group T (without preoperative analgesia). The VAS at rest and effort was noted on arrival in the recovery room then with regular intervals (T(30mn) to T(h24). A morphine titration was carried out during the first 12 postoperative hours. Hemodynamic parameters, Ramsay score and the adverse effects were noted.The three groups were comparable for the demographic data, the duration of anesthesia and peroperative morphine consumption. The evolution of VAS scores shows a significant difference between the groups P and T with the effort of cough at t24h (p = 0.04), and between the groups C and T at postoperative T 4h (p = 0.016). In our study the group C consumed to a significant degree less morphine 5.44 +/- 3.00 Mg against 7.83 +/- 4.00 Mg for the group P (p < 0.03) and 8.04 +/- 3.00 Mg for the group T (p < 0.008).The administration of 200 Mg of celecoxib in the preoperative period of a laparoscopic cholecystectomy allows a significant decrease in morphine consumption in the postoperative period and a reduction in the scores of the VAS at rest and at the effort of cough compared to the groups which received only one placebo or paracetamol.